Got a broken zipper box? You can fix that with 3D printing. Mystified about how zippers work? No need to be.

Use a keyring or a small paperclip as a temporary zipper pull. For a permanent fix, swap the broken pull tab with a new one by sliding it into place. Squeeze it closed gently with a pair of pliers.

PENNSYLVANIA, USA — It happens to all of us at one time or another. You're on your way out the door, you grab your coat, and the zipper is stuck or broken.